Can't rotate camera

I have a Logitech G502 gaming mouse, and the instructed method of rotating the camera doesn't work. From what I understand you click the scroll wheel down and hold and then move the mouse to rotate the camera. I can't find a way to rebind this function to another key or even just try to rebind it to my mouse wheel down click in case the game and the mouse don't agree on what key that motion is associated with.

Thank you good sir! I had tried restoring the whole mouse so default settings and the wheel lock button. It was the individual reassigning of the scroll wheel click to "use generic" which changed it back to "mouse button 3". BAM! Rotate camera activated.

Also, your mouse should have a tool that allows you to see and configurate mouse buttons - try the default setting with the middle wheel and see if it works. You can download it at the Logitech support site.